org.apache.karaf.tooling.url.SpringURLHandler Maven / Gradle / Ivy
/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.karaf.tooling.url;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import org.apache.karaf.deployer.spring.SpringTransformer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* As org.apache.karaf.deployer.spring.SpringURLHandler needs to be run with
* the OSGi container this class was created for use by the karaf-maven-plugin
*/
public class SpringURLHandler extends URLStreamHandler {
private final Logger logger = LoggerFactory.getLogger(SpringURLHandler.class);
private static String SYNTAX = "spring: spring-xml-uri";
private URL springXmlURL;
/**
* Open the connection for the given URL.
*
* @param url the url from which to open a connection.
* @return a connection on the specified URL.
* @throws IOException if an error occurs or if the URL is malformed.
*/
@Override
public URLConnection openConnection(URL url) throws IOException {
if (url.getPath() == null || url.getPath().trim().length() == 0) {
throw new MalformedURLException ("Path cannot be null or empty. Syntax: " + SYNTAX );
}
springXmlURL = new URL(url.getPath());
logger.debug("Spring xml URL is: [" + springXmlURL + "]");
return new Connection(url);
}
public URL getSpringXmlURL() {
return springXmlURL;
}
public class Connection extends URLConnection {
public Connection(URL url) {
super(url);
}
@Override
public void connect() throws IOException {
}
@Override
public InputStream getInputStream() throws IOException {
try {
ByteArrayOutputStream os = new ByteArrayOutputStream();
SpringTransformer.transform(springXmlURL, os);
os.close();
return new ByteArrayInputStream(os.toByteArray());
} catch (Exception e) {
logger.error("Error opening Spring xml url", e);
throw (IOException) new IOException("Error opening Spring xml url").initCause(e);
}
}
}
}